The spinnability of a spinning solution using DMSO as the solvent was investigated for dry-jet wet spinning of PAN precursor fiber. Among many variables responsible for spinnability, the coagulating conditions, the air gap length, the nonsolvent content in spinning solution, and the spinning temperature have been viewed as the key factors, and they were investigated in this study. It was found ...

We report results obtained from six XMM–Newton observations of the Seyfert galaxy 1H 0419–577. The source was observed in a wide range of different flux levels, allowing its long–term spectral variability to be studied in detail as already reported by Pounds et al (2004a; 2004b). Here we show that the X–ray spectrum is well described by a simple two– component model comprising a power law with ...

ABSTRACT The Galactic Centre is known to have undergone a recent star formation episode few Myr ago, which likely produced many T Tauri stars hosting circumstellar discs. It has been suggested that these discs may be the compact and dusty ionized sources identified as ‘G-clouds’. Given Centre’s hostile environment, we study possible evolutionary pathways experience. We compute new external phot...

L. L. Cheng, A. G. Zepeda, C. Wu, R. G. Gonzalez, A. Bielecki, D. Cory MGH/Harvard Med School, Boston, MA, United States, MIT, Cambridge, MA, United States Synopsis. Applying high resolution magic angle spinning (HRMAS) NMR spectroscopy to investigate cellular metabolism of diseases has encouraged exploration of slow spinning methodologies to better preserve tissue pathology structures against ...

High-resolution NMR of samples in the solid state is typically performed under mechanical sample spinning around an axis that makes an angle, called the magic angle, of 54.7 degrees with the static magnetic field. There are many cases in which geometrical and engineering constraints prevent spinning at this specific angle. Implementations of in-situ and ex-situ magic angle field spinning might ...

It is shown that high-resolution (1)H NMR spectra of intact excised tissues and organs can be obtained by rotating the sample slowly about an axis at the magic angle of 54 degrees 44' with the external magnetic field. In this way tissue and cellular damage invoked by standard magic angle spinning (MAS) experiments, where spinning speeds of several kHz are typically employed, are minimized. Spec...

The generalized Killing equations for the configuration space of spinning particles (spinning space) are analysed. Solutions of these equations are expressed in terms of Killing-Yano tensors. In general the constants of motion can be seen as extensions of those from the scalar case or new ones depending on the Grassmann-valued spin variables. Spinning particles, such as Dirac fermions, can be d...

The potential for barium sulphate nanoparticles to be used in a variety of important fields has sparked lot attention. Methods obtaining this material by milling (top-down approach) are not very popular due the difficulty controlling size and shape particles, as well changes their physicochemical properties during milling. More promising is bottom-up approach, which interaction Ba2+ SO42− ions ...

To enhance the production efficiency of ring spinning and reduce the tension in the spinning process, the system which installed the balloon control ring on the ring spinning machine to control the balloon configuration of the yarn in the spanning process and control the tension in the spinning process was designed in the article. The system is the automatic control system based on PLC (Program...

A process to produce fibers from Poly(m-phenyleneisophthalamide)(PMIA) solution in an ionic liquid via wet-spinning technology are described. The spinning process was investigated on a small laboratory scale. Ionic liquid spinning solutions were first prepared for PMIA fibers, followed by wet spinning. In the course of this research, the physical properties of the PMIA fibers were estimated. We...